What herbicide to use?

I got some pastures I’m wanting to spray and I am not sure what to use. I have a lot of ironweed but also a mix of about everything else you don’t want as well.

There is hardly any clover so I am not worried about burning it. The pasture is used for beef cow/calf operation and no hay is going to be made off of it. I saw the GrazonNext HL thread and thought maybe it might be the ticket? But I thought I would ask.

What herbicide to use?